The advantages of the locking devices are as follows:
elimination of play between the shaft and the part driven
uniform distribution of the load over the entire diameter
facility of synchronisation between the various possible parts connected as a set
reduction of the diameter (of project) of the drive shaft
increase of the resistant section of the drive shaft
reduction of the procurement times for machine assembly
maintenance facilitated with no need to stop the machine
availability of spare parts by main sub-suppliers of technical equipment.
The material used for the locking devices is c45 according to UNI EN 10083-1 regulations.